Plaster-block scarfing device



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Nm?. M 1924.

G. H. A. RUBY PLASTER BLOCK SCARFING DEVICE 1924 2 Shots-She e /n fa/Wr Q /Z/H ffl/bg georg y ojffwwf( Hbfweg Nv., M 1924.

G. H. A. RUBY PLASTER BLOCK SCARFING DEVICE Filed March 24 Patented Nov.. il,

-GECIfRltE HENRY ADAM RUBY, F FORT DODGE, JIOXEA, ASSIGNQR T0 vFIITIIEJLD, TRUSTEE, OF GHICAGO, ILLINOIS.

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' PLASTIEK-BLOCK 'SCARFIIG- DEVICE. p l

Application filed March 24, 1924;. Serial No. 701,851.

To all whom it may concern:

Be it known that I, GEORGE H. A. RUBY,

a citizen of the United States of America,

residing at Fort Dodge, in the county of Webster and State of Iowa, have invented certain new and useful Improvements in .Plaster-Block Scarfing Devices; and I ldo hereby declare the following to be a full,

clear, and exact description of the invention,

such as will enable others skilled in the art to which'itappertains-to make and use the same.

This invention relates to a scarfing device -for use with laster blocks or other similar blocks made rom cementitious material,.be. `ing used to roughen or scarf an exposed side of each block while the material thereof is still in a plastic state so that plastering may be done against the blocks when used in interior partition work in buildings, the plaster adhering and making a better connection thereto than ifthe blocks are smooth.

The present invention is designed to be used with machines for making plaster blocks wherein a continuously moving conveyer carries a large number of block forms having one open side into which the cementitious material is introduced vinto the forms. And it is an object and purpose pf the present invention to make a device of .this character whichis simple, comprises few parts not liable to get out of order, and which-is particularly practical and effectivde for the purposes for which it is dcs1 e l or an understanding of the invention by means of whichl these ends are attained, reference may be had to the following dccompanying drawings, in which,

Fig.V 1 is a 4fragmentary plan view of a block machine and showing the searfing device ofthe invention applied thereto, said device being shown in plan.

Fig. 2 is a fragmentary vertical transverse section through the block machine, the scarfing roller 'being shown partly in section and partly in elevation,

Fig. 3v is a fragmentary vertical longitudinal section through the block machine, the scarfing mechanism being shown in vertical section transversely thereof.

Fig. 4c is an elevation of a slightly difscription, taken in connection with the ac# ferent form of s'carfing roller from that 55 shown in Figs. 1 and 2, and

'Fig. 5 is a perspective view of the block after it is completed and scarfed' by the scarfing device of this invention.

Like reference characters refer. to like 60 parts in the -diiferent figures of the drawings. l

As shown in the drawings, a plurality of block forms are carried on conveyer chains indicated at 1, with interposed cross bars 2 of channel form connecting the chains, the bottoms 3 of the forms being permanently secured to the said barst?. The forms lie side by side with vertical cross 'division plates 4 between them; and are 70 completed by ends 5 wherebyindividual block forms are made in 'each' of which a block 6 may be mad/e from cementitious material. As blocks made from plaster stucco material, in order tosave material, .are made with longitudinal openings therethrough, the machine is provided with a number of cores 7 for each'block form which are attached to a common head 8 slidably mounted on guides 9, as shown, the cores 7 extending through each end of each block form and meeting at the mid-portion of the form. Thisy construction Yis old, and well known andJ is fully disclosed in a patent heretofore granted von an vapplication by me and need not be further specifically outlined. It is suicient to say that the conveyer moves continuously in one direction and the forms receive cementitious material in a wet and plastic state and are designed to hold the blocks sufficiently long that the same may become set and hardened.

The material for the blocks is put intol the forms on the upper run` of the conveyer and the upper sides of the blocks are left exposed. 'It is this side of'each block that is to be acted upon by the scarfng device which I have applied to the block machine.

In the construction of the device, a pair of spaced apart vertical osts 10 are secured ma at each side of the mac line and connected togetherv to make a rigidv frame work through bars 11 and 12 connectin posts on opposite sides ofthe machine, and connecting bars 13, 14 and 15 connecting'the up- 105 per bars`11, as shown in Figs. 1 and 2. The bar 13 is at one end of the bars 11, while bars 14, and 15 are located substantially above the ends 4of the .block` forms. A shaft 16`is rotatably mounted in' suitable bearings 17 carried on the-bars 13,14 and 15. with a sprocket Wheel 18 for driving by a chain 19 from any suitable source of power.

On the shaft 16 between the bearings 1T a scarfing roller 2O is secured. y This roller lies directly over the block forms and the same is grooved, as shown. The groovesl may be as shown in the roller 2()a in Fig. 4 where the same run straight around the roller, or may be zig-zag grooves of the which may stick to the roller.

character shown in Figs. 1 and 2. In either case the roller is mounted to come into contact engagement with the exposed upper faces of the blocks carried in the forms so that when the said blocks pass under the roller, the upper exposed surfaces thereof are grooved transversely of the lengths-ofthe blocks, the grooves being either straight or zig-zag dependent upon the type of scarfing roller used. It is evident that as the blocks pass under the roller, there is a tendency for the frictional 4engagement of the blocks and rollers to turn the roller, and this `i'rictional engagement may be sufiicient to operate the roller without auxiliary driving meanssuch as shown in Fig. 1, at 18 and 19. The inventioncomprehends either manner of operation.

A scraper plate 21 is connected, by means of bolts 22 passing through short slots 23 in the plate, to a bar 11 and has its free edge notched so as to lit 4the grooves and ridges of the roller 20 tov serve as a scraper to remove any of the cementitious material Where a roller grooved with straight grooves, as shown in Fig. 4, is used, it is not necessary to provide the slots 23 in the plate, these being provided only with the zig-zag grooves to permit the limited longitudinal movement of the plate necessary so that its notched or serrated edge may follow said grooves.

It is apparent that with a construction of this character, thel exposed side of each block is scarfed so that a surface is made to which plaster fivill adhere. This'scarfed surface is indicated at 24 as made with the At its outerend it may be equipped posed posts,

permost of said first bars, a sha t located above the cross bars and rotatably-mountedy considered as compre' thereinto, and a grooved roller mounted to engage with the exposed upper surfaces of lthe blocks made in said forms from said .material to scarf the same as the conveyer, forms and blocks pass under the roller.

2. In combination, a block machine including a lconveyer mounted for movement and individual block forms carried by the conveyer having open upper-sides for the passage of cementitious material thereinto, and a grooved roller mounted with the axis thereof parallel to the length of the forms and adapted to engage with the exposed upper surfacesof the blocks While in a plastic state in said forms to thereby scarf the sameI transversely as the conveyer, forms and blocks therein pass under the roller.

3. In combination, a block machine including a conveyer movable longitudinally in one direction and carrying a plurality of individual block forms located side by side located across Vthe machine,A anda grooved roller rotatably mounted above the forms, said forms having open upper sides :tor the entrance -of cementitious material vthereinto, and said roller turning as the conveyer, forms and blocks therein are movedunder the roller, said roller engaging against the upper exposed surfaces of the blocks and thereby scariing the same.

4. In combination with a movable conveyer, block forms carried thereby into which cementitious material is designed to be put, and meansy for acting against the upper exposed surfaces of blocks in said forms to scarf the same and alternately provide grooves and ridges therein across the same, substantially as described.

5. In combination with a movable conveyer, block forms carried thereby having open upper sides for entrance of cementitious material thereinto, posts located each side of the machine, bars connecting opcross' bars connectin the upin bearings carried by said cross bars, and a grooved roller on the shaft directly above the forms and positioned so that its surface Will engage with the upper exposed surfaces of blocks made of cementitious mate! rial located in said forms.

6. A construction containing the elements in combination defined in claim 5, combined with a sprocket Wheel cornected to the shaft, and a chain for driving the said sprocket Wheel.

7. A construction containing the elements in combination defined in claim 1 combined with means for driving the roller continuously, substantially as described.

8. In a machine of the class described, means for moving blocks of cementitious material continuously by a given point, and a grooved rollerlocatedover the blocks and engaging With the upper surfaces thereof to scarf said surfaces.

9. ln combination, .a block machine including a conveyer movable in a given direction and individual block forms carried by the conveyer having open upper sides for the entrance of cementitious material thereinto, and a roller rotatably mounted above the said forms and formed With alternate grooves and ridges around the same to engage with the exposed upper surfaces of the blocks made in said forms, substantially as and for the purposes described.

l0. In combination, a block machine including a conveyer movable in a given direction and individual block forms carried on and transversely of the conveyer having open upper sides for the entrance of cementitious material thereinto, and a roller formed at its outer surface With alternate zigzag grooves and ridges rotatably mounted to engage with the exposed surfaces of blocks in said forms, substantially as described;

11. A construction containing the elements in combination defined in claim 9, combined with a Scraper plate mounted adjacent the roller and having one edge serrated to conform with the grooves and ridges in the roller, said edge lying closely adjacent to the roller, substantially as described.

12. A construction containing the ele ments in combination defined in claim 10, combined With a scraper plate formed with one edge serrated to conform to the grooves and ridges in the roller, and means for mounting the plate adjacent its other edge for limited longitudinal movement Whereby the plate may follow the zig-zag shape of the said grooves and ridges in the roller.

ln testimony whereof I aix my signature.

-GEORGE HENRY ADAM RUBY. 

